Add Map.Copy and Set.Copy

seq/map.go

@@ -241,3 +241,12 @@ func (a Map[K, V]) Get(k K) opt.Opt[V] {
 	}
 	return opt.Empty[V]()
 }
+
+// Copy returns a copy of this map
+func (a Map[K, V]) Copy() Map[K, V] {
+	dup := make(Map[K, V], len(a))
+	for k, v := range a {
+		dup[k] = v
+	}
+	return dup
+}

seq/set.go

@@ -252,3 +252,12 @@ func (s Set[K]) Intersect(other Set[K]) Seq[K] {
 	}
 	return other.Where(s.Contains)
 }
+
+// Copy returns a copy of this set
+func (s Set[K]) Copy() Set[K] {
+	dup := make(Set[K], len(s))
+	for k := range s {
+		dup[k] = struct{}{}
+	}
+	return dup
+}

seq/slice.go

@@ -16,20 +16,23 @@ import (
 //
 // # Examples:
 //
-//	// Slices can be created as literals
-//	mySlice := seq.Slice[string]{"one", "two"}
+//		// Slices can be created as literals
+//		mySlice := seq.Slice[string]{"one", "two"}
 //
-//	// They can be allocated with make()
-//	emptySliceWithCap10 := make(seq.Slice[string], 0, 10)
+//		// They can be allocated with make()
+//		emptySliceWithCap10 := make(seq.Slice[string], 0, 10)
 //
-//	// You can call len()
-//	fmt.Println("Length of mySlice:", len(mySlice))
+//		// You can call len()
+//		fmt.Println("Length of mySlice:", len(mySlice))
 //
-//	// You can iterate with an idiomatic for-loop
-//	for i, v := range mySlice { fmt.Println("Index:", i, "Value:", v) }
+//		// You can iterate with an idiomatic for-loop
+//		for i, v := range mySlice { fmt.Println("Index:", i, "Value:", v) }
 //
-//	// You can access elements by index
-//	twoString := mySlice[1]
+//		// You can access elements by index
+//		twoString := mySlice[1]
+//
+//	 // You can use slicing
+//		subSlice := mySlice[0:1]
 type Slice[T any] []T
 
 // Empty returns an empty seq